app_store_version_experiments_update_instance

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are supplied, so the description carries the full behavioral burden, and it delivers almost nothing beyond the HTTP verb and path. It discloses deprecation status (useful lifecycle context) but says nothing about required permissions, whether changes are reversible, or side effects of updating an experiment.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Very short and front-loaded with the deprecation flag and the endpoint. The parenthetical repeats the same PATCH path verbatim, which is mild redundancy, but there is no padding otherwise.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

This is a mutating tool with no annotations, no output schema, and a free-form body object (additionalProperties: {}). The description defers body construction entirely to an external OpenAPI document that the agent likely cannot resolve, leaving the request shape effectively unspecified.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%: both 'id' and 'body' are documented in the schema. The description's only added value is pointing at components.schemas.AppStoreVersionExperimentUpdateRequest, which merely repeats the schema's own body description, so the baseline 3 applies.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description names the resource (appStoreVersionExperiments) and the operation (PATCH .../{id}), so an agent can tell this updates an existing experiment instance. It does not explicitly distinguish itself from the sibling app_store_version_experiments_v2_update_instance or note that a v2 successor exists, but the verb+resource pairing is unambiguous.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The only usage signal is the '[DEPRECATED]' tag, which hints the tool should be avoided but never names the recommended alternative (e.g., the v2 update tool) or states conditions under which this legacy endpoint is still required. No when-to-use or when-not-to-use guidance is provided.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.